man 5 I really like these weight clamps. They make changing weights quick and easy. They grip very tight, and no plate will be able to fall off. My weights aren’t that big though, so I can’t vouch for absolutely massive weights, but even in that case, I think plates won’t move.I only had the old style screw in type, and the others with the screw pin - up to now. The screw on type are annoying when trying to change weights in between sets. They also slightly loosen with use, and cause the plates to rattle.I wish I could change to these clamps on all my dumbbells.Very satisfied with this purchase.